Whipstock anchor



Patented Sept." 2, 1930 IBAB'I'HOL B. LUND, OF LONG- BEACH, CALIFORNIA WHIPSTOCK ANCHOR Application filed. July 1, 1929. Serial No. 375,274.

This invention relates to a whip stock an chor by means of which the whip stock is securely fastened in the hole so that it will not move prior to or after thetime that the bit is again inserted into the hole for the purpose of drilling in the proper direction.

It will be understood that in the rotary drilling of wells, and particularly oil wells, the bit is deflected from the vertical to a very considerable extent. This condition is very undesirable because of the bends in the easi-ng, tube, sucker rods and the like.

Whip stocks have been used heretofore and their purpose is to deflect the bit from its angular direction to the proper vertical direction or as nearly the vertical as possible. Heretofore the whip stock has been cemented in place which requires considerable time in that the cement had to set, and also it was. frequently found that the Whip stock floated away-from the position that it should properly take, and was found a considerable distance upwardly in the well.

An object of my invention is to provide a means whereby a whip stock may be positively anchored in the well, and may be held in proper-position without use. of cement or I any other similar material.

Other objects, advantages and features of 3 the invention may appear from the accompanying detailed description on the appended claims.

In the drawing Figure 1 is a side elevation of my whip stock in position in a well, the well being shown in section.

Figure 2 is 'a longitudinal section view of the whip stock..

Figure 3 is a section view taken on the line 3-3 of Figure 2.

Referring more particularly to the drawing, the numeral 1 indicates the well bore which frequently extends off at an angle from the vertical, as shown at 2. It is the angular direction of the bore which must be rectified. The whipstock 3 is placed in the angular part of the bore 2, and the tapering upper edge 4 of the whip 'stock is so set that when the bit strikes this said tapering edge surface it 50 will be deflected into the proper vertical dioutwardly into the formation.

rection. I have here shown the whip stock as resting on the bottom of the hole,however, it will be evident that the hole may be ccmented at a certain point, and the whip stock shall not move once it is set in position, and also that the upper edge t shall not turn otherwise the bit would be deflected in the wrong direction.

My'whip stock includes an upwardly tubular'section 5 the top of which is formed with the inclined edge 4:.

A sleeve 6 is slidably mounted in the tube 5 and projects from the bottom thereof. A plug 7 may be screwed into the'bottom of the sleeve 6 to close the same, and also to enable the sleeve to readily pass under the angular positions of the hole.

A pair of dogs 89 are pivotally mounted in the sleeve 6 upon a pin 10, which pin is suitably secured or journaled in the sleeve. The dogs 8-9 project through slots 11-12 respectively in the sleeve 6, and through coincidental slots 131& respectively in the tube 5. It will be evident that when the sleeve 6 moves upwardly in the tube 5, that the dogs 8-9 will be swung outwardly, and projected into the formation. Qnce this is accomplished, the whip stock is securelyheld,

and can neither rotate nor move upwardly in the hole.

A stop pin 15 is provided in the tube 5 for the purpose of limiting the upward movement of the sleeve 6. The whip stock 3 is lowered into the hole on the bottom of usual pipe or tube 16, and the whip stock is held on the pipe by small rivets or bolts 17 When the bottom is reached the weight of the pipe causes the tube 5 to slide downwardly over the sleeve 6 through forcing the dogs 89 A further lowering of the pipe will cause the bolts 17 to shear OK so that the whip stock can remain in the hole.

Having described my invention I claim: 1. A whipstock including an upper tubular section, a lower sleeve section slidable in said tube, and protruding therefrom, said tube and sleeve having co-incidental slots formed therein, a pair of dogs pivotally mounted in said sleeve, said dogs being adapted to'protrude through said slots.

2. A whip stock including an upper tubular section, a lower sleeve section slidable 5 in said tube, and protruding therefrom, said tube and sleeve having co-incidental slots formed therein, a pair of dogs pivotally mounted in said sleeve, said dogs being adapted to protrude through said slots, 2. 1o plug in the bottom of said sleeve, and a stop pin in said tube adapted to limit the upward movement of said sleeve.

3. A whip stock including a tubular section, an upper inclined edge on said tube, a 15 sleeve slidable in the tube and protruding from the bottom thereof, a plug screwed into the bottom of said sleeve, a stop-pin in the tube adapted to limit the upward movement of the sleeve, said tube and sleeve having op- 20 positely positioned co-incidental slots formed therein, a pair of dogs protrudingly secured in the sleeve and protruding through said slots, said dogs being adapted to be swung outwardly when the sleeve moves upwardly. 25 In testimony whereof, I affix my signature.

BARTHOL B. LUND. 

